If overfishing were the only threat to their survival you’d have a point. Their small range, preferred diet and habitat and other factors put them in a very precarious position. They will very likely be listed as threatened in the next few years.

How could a ring of teeth not involve a series of tubes? Sure you could open an airport bar with a narwhal theme and try to grow them from seed tissue, occasionally making toothpaste ads (is freezing saltwater brine making your teeth…sparkly purple? Well, we have the thing) but there’s no guaranteeing you make luxist regularly. FWIW: So, the USA has them on the Endangered list, just yet, and that’s why the trade was a crime.